./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:17:50,849 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:17:50,955 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:17:50,966 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:17:50,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:17:51,005 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:17:51,008 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:17:51,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:17:51,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:17:51,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:17:51,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:17:51,018 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:17:51,018 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:17:51,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:17:51,028 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:17:51,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:17:51,029 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:17:51,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:17:51,030 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:17:51,030 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:17:51,031 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:17:51,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:17:51,032 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:17:51,033 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:17:51,033 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:17:51,033 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:17:51,034 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:17:51,035 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:17:51,036 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:17:51,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:51,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:17:51,038 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:17:51,038 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:17:51,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:17:51,039 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:17:51,039 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:17:51,040 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:17:51,040 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:17:51,040 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa [2023-11-12 02:17:51,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:17:51,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:17:51,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:17:51,412 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:17:51,413 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:17:51,414 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2023-11-12 02:17:54,524 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:17:54,776 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:17:54,776 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2023-11-12 02:17:54,783 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/data/cd5db2e21/52fafd5609544b78b602663a809cd120/FLAG2986bc947 [2023-11-12 02:17:54,798 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/data/cd5db2e21/52fafd5609544b78b602663a809cd120 [2023-11-12 02:17:54,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:17:54,803 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:17:54,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:54,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:17:54,810 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:17:54,811 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,812 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e736936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54, skipping insertion in model container [2023-11-12 02:17:54,813 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,835 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:17:55,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:55,051 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:17:55,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:55,095 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:17:55,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55 WrapperNode [2023-11-12 02:17:55,096 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:55,098 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:55,098 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:17:55,098 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:17:55,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,160 INFO L138 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-11-12 02:17:55,160 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:55,161 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:17:55,161 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:17:55,162 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:17:55,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,196 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,200 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,206 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:17:55,216 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:17:55,217 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:17:55,217 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:17:55,218 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (1/1) ... [2023-11-12 02:17:55,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:55,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:17:55,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:17:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:17:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:17:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:17:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:17:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:17:55,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:17:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:17:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:17:55,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:17:55,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:17:55,379 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:17:55,382 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:17:55,616 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:17:55,623 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:17:55,624 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:17:55,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:55 BoogieIcfgContainer [2023-11-12 02:17:55,626 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:17:55,636 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:17:55,637 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:17:55,640 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:17:55,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:17:54" (1/3) ... [2023-11-12 02:17:55,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141d7e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:55, skipping insertion in model container [2023-11-12 02:17:55,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:55" (2/3) ... [2023-11-12 02:17:55,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141d7e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:55, skipping insertion in model container [2023-11-12 02:17:55,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:55" (3/3) ... [2023-11-12 02:17:55,643 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-2.i [2023-11-12 02:17:55,661 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:17:55,661 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-12 02:17:55,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:17:55,713 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b30a2c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:17:55,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-12 02:17:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 32 states have (on average 1.6875) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:17:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 02:17:55,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:17:55,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 02:17:55,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:17:55,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-11-12 02:17:55,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:55,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720817461] [2023-11-12 02:17:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:55,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:56,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:56,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720817461] [2023-11-12 02:17:56,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720817461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:56,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:56,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:17:56,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809235647] [2023-11-12 02:17:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:56,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:56,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:56,080 INFO L87 Difference]: Start difference. First operand has 48 states, 32 states have (on average 1.6875) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:17:56,211 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-11-12 02:17:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:56,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 02:17:56,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:17:56,229 INFO L225 Difference]: With dead ends: 42 [2023-11-12 02:17:56,229 INFO L226 Difference]: Without dead ends: 40 [2023-11-12 02:17:56,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:56,241 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:17:56,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:17:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-12 02:17:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-12 02:17:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 36 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:17:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2023-11-12 02:17:56,283 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 4 [2023-11-12 02:17:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:17:56,283 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2023-11-12 02:17:56,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2023-11-12 02:17:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 02:17:56,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:17:56,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 02:17:56,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:17:56,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:17:56,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:56,286 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-11-12 02:17:56,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:56,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508095147] [2023-11-12 02:17:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:56,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:56,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:56,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508095147] [2023-11-12 02:17:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508095147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:56,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:56,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:17:56,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126847119] [2023-11-12 02:17:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:56,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:56,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:56,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:56,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:56,458 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:17:56,586 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2023-11-12 02:17:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:56,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 02:17:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:17:56,589 INFO L225 Difference]: With dead ends: 63 [2023-11-12 02:17:56,589 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 02:17:56,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:56,592 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:17:56,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 49 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:17:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 02:17:56,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2023-11-12 02:17:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.380952380952381) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:17:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-11-12 02:17:56,606 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 4 [2023-11-12 02:17:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:17:56,607 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-11-12 02:17:56,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-11-12 02:17:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 02:17:56,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:17:56,608 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:56,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:17:56,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:17:56,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-11-12 02:17:56,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:56,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099619736] [2023-11-12 02:17:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:56,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:56,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:56,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099619736] [2023-11-12 02:17:56,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099619736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:56,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653881364] [2023-11-12 02:17:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:56,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:56,864 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:56,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:17:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:56,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:17:56,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:57,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:17:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:57,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:57,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653881364] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:57,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:57,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-12 02:17:57,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821646660] [2023-11-12 02:17:57,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:57,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:17:57,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:17:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:17:57,176 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:17:57,444 INFO L93 Difference]: Finished difference Result 125 states and 158 transitions. [2023-11-12 02:17:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:17:57,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 02:17:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:17:57,448 INFO L225 Difference]: With dead ends: 125 [2023-11-12 02:17:57,448 INFO L226 Difference]: Without dead ends: 125 [2023-11-12 02:17:57,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:17:57,451 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 157 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:17:57,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 95 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:17:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-12 02:17:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2023-11-12 02:17:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 92 states have (on average 1.2934782608695652) internal successors, (119), 96 states have internal predecessors, (119), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:17:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 135 transitions. [2023-11-12 02:17:57,467 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 135 transitions. Word has length 8 [2023-11-12 02:17:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:17:57,467 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 135 transitions. [2023-11-12 02:17:57,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 135 transitions. [2023-11-12 02:17:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 02:17:57,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:17:57,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:57,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:57,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:57,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:17:57,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:57,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1897655597, now seen corresponding path program 1 times [2023-11-12 02:17:57,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:57,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854549916] [2023-11-12 02:17:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:57,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:57,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:57,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854549916] [2023-11-12 02:17:57,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854549916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:57,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:57,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:17:57,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511638395] [2023-11-12 02:17:57,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:57,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:57,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:17:57,796 INFO L87 Difference]: Start difference. First operand 106 states and 135 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:17:57,845 INFO L93 Difference]: Finished difference Result 105 states and 134 transitions. [2023-11-12 02:17:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:57,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 02:17:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:17:57,849 INFO L225 Difference]: With dead ends: 105 [2023-11-12 02:17:57,849 INFO L226 Difference]: Without dead ends: 103 [2023-11-12 02:17:57,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:17:57,851 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:17:57,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 67 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:17:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-12 02:17:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-12 02:17:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 93 states have internal predecessors, (112), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:17:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2023-11-12 02:17:57,865 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 9 [2023-11-12 02:17:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:17:57,866 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2023-11-12 02:17:57,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:57,867 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2023-11-12 02:17:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 02:17:57,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:17:57,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:57,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:17:57,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:17:57,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:57,871 INFO L85 PathProgramCache]: Analyzing trace with hash 443610757, now seen corresponding path program 1 times [2023-11-12 02:17:57,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:57,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545113185] [2023-11-12 02:17:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:57,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:58,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:58,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545113185] [2023-11-12 02:17:58,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545113185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:58,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:58,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:17:58,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697947703] [2023-11-12 02:17:58,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:58,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:17:58,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:58,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:17:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:17:58,025 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:17:58,095 INFO L93 Difference]: Finished difference Result 127 states and 155 transitions. [2023-11-12 02:17:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 02:17:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:17:58,098 INFO L225 Difference]: With dead ends: 127 [2023-11-12 02:17:58,098 INFO L226 Difference]: Without dead ends: 121 [2023-11-12 02:17:58,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:17:58,101 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:17:58,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 74 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:17:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-12 02:17:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2023-11-12 02:17:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 94 states have internal predecessors, (111), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:17:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2023-11-12 02:17:58,121 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 15 [2023-11-12 02:17:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:17:58,121 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2023-11-12 02:17:58,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2023-11-12 02:17:58,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 02:17:58,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:17:58,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:58,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:17:58,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:17:58,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:58,129 INFO L85 PathProgramCache]: Analyzing trace with hash -144029224, now seen corresponding path program 1 times [2023-11-12 02:17:58,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:58,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883509311] [2023-11-12 02:17:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:58,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:17:58,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:58,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883509311] [2023-11-12 02:17:58,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883509311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:58,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:58,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:17:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864538322] [2023-11-12 02:17:58,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:58,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:58,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:58,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:58,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:17:58,271 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:58,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:17:58,333 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2023-11-12 02:17:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-12 02:17:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:17:58,343 INFO L225 Difference]: With dead ends: 119 [2023-11-12 02:17:58,343 INFO L226 Difference]: Without dead ends: 119 [2023-11-12 02:17:58,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:17:58,348 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:17:58,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 49 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:17:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-12 02:17:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2023-11-12 02:17:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 94 states have internal predecessors, (111), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:17:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2023-11-12 02:17:58,373 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 14 [2023-11-12 02:17:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:17:58,374 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2023-11-12 02:17:58,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2023-11-12 02:17:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 02:17:58,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:17:58,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:58,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:17:58,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:17:58,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:58,379 INFO L85 PathProgramCache]: Analyzing trace with hash -978534878, now seen corresponding path program 1 times [2023-11-12 02:17:58,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:58,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985386258] [2023-11-12 02:17:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:58,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:58,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:58,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985386258] [2023-11-12 02:17:58,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985386258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:58,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:58,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:17:58,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032267003] [2023-11-12 02:17:58,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:58,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:17:58,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:17:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:17:58,702 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:17:58,863 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2023-11-12 02:17:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:17:58,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-12 02:17:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:17:58,865 INFO L225 Difference]: With dead ends: 112 [2023-11-12 02:17:58,866 INFO L226 Difference]: Without dead ends: 112 [2023-11-12 02:17:58,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:17:58,867 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:17:58,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 184 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:17:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-12 02:17:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2023-11-12 02:17:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 97 states have internal predecessors, (114), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:17:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2023-11-12 02:17:58,888 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 19 [2023-11-12 02:17:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:17:58,889 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2023-11-12 02:17:58,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2023-11-12 02:17:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:17:58,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:17:58,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:58,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:17:58,895 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:17:58,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:58,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1123657531, now seen corresponding path program 1 times [2023-11-12 02:17:58,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:58,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698350438] [2023-11-12 02:17:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:17:59,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:59,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698350438] [2023-11-12 02:17:59,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698350438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:59,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524754792] [2023-11-12 02:17:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:59,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:59,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:59,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:59,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:17:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:59,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:17:59,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:59,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:59,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-12 02:17:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:59,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524754792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:59,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:59,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-12 02:17:59,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406245589] [2023-11-12 02:17:59,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:59,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:17:59,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:17:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:17:59,499 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:17:59,791 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2023-11-12 02:17:59,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:17:59,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 02:17:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:17:59,793 INFO L225 Difference]: With dead ends: 164 [2023-11-12 02:17:59,794 INFO L226 Difference]: Without dead ends: 164 [2023-11-12 02:17:59,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:17:59,796 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 250 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:17:59,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 181 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:17:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-12 02:17:59,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2023-11-12 02:17:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 94 states have internal predecessors, (111), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:17:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2023-11-12 02:17:59,806 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 18 [2023-11-12 02:17:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:17:59,807 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2023-11-12 02:17:59,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2023-11-12 02:17:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 02:17:59,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:17:59,808 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-11-12 02:17:59,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:00,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:00,014 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:18:00,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-11-12 02:18:00,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:00,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959168986] [2023-11-12 02:18:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:00,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:00,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:00,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959168986] [2023-11-12 02:18:00,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959168986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:00,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107796052] [2023-11-12 02:18:00,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:18:00,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:00,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:00,248 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:00,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:18:00,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:18:00,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:00,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:18:00,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:00,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:18:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:00,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:00,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107796052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:00,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:00,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-12 02:18:00,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611195325] [2023-11-12 02:18:00,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:00,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:18:00,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:00,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:18:00,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:18:00,798 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:01,607 INFO L93 Difference]: Finished difference Result 295 states and 368 transitions. [2023-11-12 02:18:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:18:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 02:18:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:01,610 INFO L225 Difference]: With dead ends: 295 [2023-11-12 02:18:01,610 INFO L226 Difference]: Without dead ends: 295 [2023-11-12 02:18:01,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:18:01,611 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 428 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:01,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 450 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:18:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-12 02:18:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 228. [2023-11-12 02:18:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 202 states have (on average 1.2178217821782178) internal successors, (246), 205 states have internal predecessors, (246), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-12 02:18:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 286 transitions. [2023-11-12 02:18:01,622 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 286 transitions. Word has length 20 [2023-11-12 02:18:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:01,622 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 286 transitions. [2023-11-12 02:18:01,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 286 transitions. [2023-11-12 02:18:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 02:18:01,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:01,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:01,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 02:18:01,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:01,833 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:18:01,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:01,833 INFO L85 PathProgramCache]: Analyzing trace with hash -64649085, now seen corresponding path program 1 times [2023-11-12 02:18:01,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:01,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727579765] [2023-11-12 02:18:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:01,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:18:02,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:02,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727579765] [2023-11-12 02:18:02,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727579765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:02,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:02,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:18:02,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279986087] [2023-11-12 02:18:02,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:02,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:18:02,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:18:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:18:02,231 INFO L87 Difference]: Start difference. First operand 228 states and 286 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:02,376 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2023-11-12 02:18:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:18:02,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-12 02:18:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:02,378 INFO L225 Difference]: With dead ends: 234 [2023-11-12 02:18:02,378 INFO L226 Difference]: Without dead ends: 234 [2023-11-12 02:18:02,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:18:02,379 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:02,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 172 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:18:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-12 02:18:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 224. [2023-11-12 02:18:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 199 states have (on average 1.2160804020100502) internal successors, (242), 201 states have internal predecessors, (242), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-12 02:18:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2023-11-12 02:18:02,389 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 25 [2023-11-12 02:18:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:02,389 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2023-11-12 02:18:02,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2023-11-12 02:18:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-12 02:18:02,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:02,392 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-12 02:18:02,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:18:02,392 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:18:02,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:02,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1157298733, now seen corresponding path program 2 times [2023-11-12 02:18:02,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:02,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119107585] [2023-11-12 02:18:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:02,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 02:18:02,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:02,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119107585] [2023-11-12 02:18:02,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119107585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:02,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705787999] [2023-11-12 02:18:02,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:18:02,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:02,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:02,708 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:02,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:18:02,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:18:02,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:02,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:18:02,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 02:18:03,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:03,762 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-12 02:18:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 02:18:03,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705787999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:03,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:03,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2023-11-12 02:18:03,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158755308] [2023-11-12 02:18:03,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:03,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-12 02:18:03,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-12 02:18:03,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2023-11-12 02:18:03,810 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 28 states, 27 states have (on average 3.037037037037037) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:04,839 INFO L93 Difference]: Finished difference Result 315 states and 398 transitions. [2023-11-12 02:18:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:18:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.037037037037037) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-12 02:18:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:04,840 INFO L225 Difference]: With dead ends: 315 [2023-11-12 02:18:04,840 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 02:18:04,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2023-11-12 02:18:04,842 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 802 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:04,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 404 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:18:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 02:18:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-12 02:18:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2023-11-12 02:18:04,844 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2023-11-12 02:18:04,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:04,845 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2023-11-12 02:18:04,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.037037037037037) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2023-11-12 02:18:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:18:04,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:04,846 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2023-11-12 02:18:04,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 02:18:05,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:18:05,046 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:18:05,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2023-11-12 02:18:05,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:05,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019836065] [2023-11-12 02:18:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:05,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:05,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019836065] [2023-11-12 02:18:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019836065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486986204] [2023-11-12 02:18:05,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:18:05,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:05,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:05,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:05,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:18:05,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-12 02:18:05,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:05,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:18:05,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:05,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:18:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:06,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:07,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486986204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:07,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:07,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-11-12 02:18:07,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087468250] [2023-11-12 02:18:07,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:07,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-12 02:18:07,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-12 02:18:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=838, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 02:18:07,204 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 37 states, 36 states have (on average 3.611111111111111) internal successors, (130), 37 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:07,940 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2023-11-12 02:18:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:18:07,941 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.611111111111111) internal successors, (130), 37 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-12 02:18:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:07,942 INFO L225 Difference]: With dead ends: 93 [2023-11-12 02:18:07,942 INFO L226 Difference]: Without dead ends: 93 [2023-11-12 02:18:07,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=764, Invalid=1398, Unknown=0, NotChecked=0, Total=2162 [2023-11-12 02:18:07,944 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:07,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:18:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-12 02:18:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-12 02:18:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2023-11-12 02:18:07,947 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 44 [2023-11-12 02:18:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:07,947 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2023-11-12 02:18:07,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.611111111111111) internal successors, (130), 37 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2023-11-12 02:18:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-12 02:18:07,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:07,950 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1] [2023-11-12 02:18:07,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:08,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:18:08,150 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:18:08,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1667733768, now seen corresponding path program 4 times [2023-11-12 02:18:08,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:08,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943454113] [2023-11-12 02:18:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:08,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:09,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:09,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943454113] [2023-11-12 02:18:09,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943454113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:09,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551972355] [2023-11-12 02:18:09,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:18:09,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:09,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:09,399 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:09,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:18:09,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:18:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:09,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-12 02:18:09,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:09,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:18:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:11,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:13,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551972355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:13,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:13,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2023-11-12 02:18:13,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938334829] [2023-11-12 02:18:13,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:13,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-12 02:18:13,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-12 02:18:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=3750, Unknown=0, NotChecked=0, Total=4970 [2023-11-12 02:18:13,752 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 71 states, 70 states have (on average 3.914285714285714) internal successors, (274), 71 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:18,836 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2023-11-12 02:18:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-12 02:18:18,837 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.914285714285714) internal successors, (274), 71 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-11-12 02:18:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:18,839 INFO L225 Difference]: With dead ends: 189 [2023-11-12 02:18:18,839 INFO L226 Difference]: Without dead ends: 189 [2023-11-12 02:18:18,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2782, Invalid=5774, Unknown=0, NotChecked=0, Total=8556 [2023-11-12 02:18:18,845 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:18,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 752 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:18:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-12 02:18:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-11-12 02:18:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2023-11-12 02:18:18,852 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 92 [2023-11-12 02:18:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:18,853 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2023-11-12 02:18:18,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.914285714285714) internal successors, (274), 71 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2023-11-12 02:18:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:18:18,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:18,857 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1] [2023-11-12 02:18:18,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:19,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:18:19,058 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:18:19,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:19,058 INFO L85 PathProgramCache]: Analyzing trace with hash -78753968, now seen corresponding path program 5 times [2023-11-12 02:18:19,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:19,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604639759] [2023-11-12 02:18:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:19,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:22,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:22,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604639759] [2023-11-12 02:18:22,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604639759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:22,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067292142] [2023-11-12 02:18:22,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:18:22,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:22,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:22,987 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:22,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29aafb23-c3c3-43bc-8d9f-8befe811cea5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process